Self-locking hinge



No. 753,443 PATENTED MAR. 1, 1904.

N. J. ST. HILAIRE.

SELF LOOKING HINGE.

APPLICATION mum APR. a0. 1903.

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SELF LOOKING HINGE.

AP PLIGATION FILED APB. 30, 1903.-

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UNITED STATES Patented March 1, 1904.

PATENT OFFICE.

NAPOLEON J. ST. OF GARDNER, MASSACHUSETTS.

SELF-LOCKING HINGE.

SPEbIFICATION forming part of Letters Patent N 0. 753,443, datedMarch 1. 1904.

Application filed April 30, 1903- To all whom it may concern:

' Be it known that I, NAPoLE'oN J. Sr. HI- LAIRE, a citizen of theUnited States, residing at Gardner, in the county of Worcester and Stateof Massachusetts, have invented certain new and useful Improvements inSelf-Locking Hinges; and I do declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same. v

This invention relates to improvements in self-locking hinges for blindsand the like.

The object of the invention is to provide a hinge for blinds, doors,gates, and the like on which the same may be supported and swung, meansbeing provided whereby the blind,door, or gate may be locked either inan open or closed position, another object being to provide meanswhereby the swinging member of the hinge will be prevented from beingaccidentally removed from the rigid member, a further object being toprovide a hinge of this character which will be simple, strong, anddurable, inexpensive, and well adapted to the use for which it isdesigned.

With these and other objects in view the invention consists of certainnovel features of construction, combination, and arrangement of parts,as will be more fully described, and particularly pointed out in theappended claim.

Figure l is a side elevation of a blind and part of a window-casing,showing the application of the hinge. Fig. 2 is a perspective view ofthe blind or swinging member of the hinge. Fig. 3 is a similar view ofthe casing or rigid member. Fig. 4 is a side elevation of the membersengaged, showing the position of the parts when the blind is partlyopen. Fig. 5 is a vertical sectional view; and Fig. 6 is a top plan viewof the connected members, showing a portion of a blind in section and inopen position.

In the drawings, 1 denotes a blind. 2 denotes the window-casing. 3denotesthe upper hinge, which may be of any suitable construction, and 4denotes the lower hinge.

5 denotes the blind or swinging member of the hinge, which consists ofan outwardly- Serial No. 154,990. (No model.)

12 denotes a vertical centrally-disposed circular hole or bore formedthrough the head 7, and in one side of the walls of the hole is formed avertically-disposed slot or notch 13, which extends throughout theentire depth of the hole.'

14 denotes an attaching-plate formed on the inner end of the arm 6, inwhich are formed screw-holes by which the member may be attached to ablind.

.15 denotes a barbed spike or point projecting from the plate 14 andadapted to be driven into the edge of the blind to also hold the hingemember in place.

16 denotes the casing or rigid member, which consists of anoutwardly-projecting arm 17, formed on its outer end with an enlargedcircular head or plate 18, on which is formed an upwardly-projectingcentrally-disposed pintle 19, having formed on its inner end alaterallyprojecting lug 20.

21 denotes an upwardly projecting lug formed on the arm 16, and '22denotes an attaching-plate formed on the inner end of the arm 17,inwhich are formed screw-holes by which the member may be attached to awindow-casing, and 23 denotes a barbed spike or point projecting fromthe plate 22 and adapted to be driven into the casing as an additionalsupport for the rigid member.

In, hanging the blind the blind or swinging members of theupper andlower hinges are placed over the casing members in such a position thatthe slot or notch 13 in the, lower blind member will be in line with thelug 20 I on the pintle 19 of the lower casing member. The members of theupper hinge being in line, the parts will slip together, the upper endof the pintle and the lug 20 coming through the hole 12 and projectingabove the circular head of the blind member and the flange 8 of the sameresting on the lug 21 of the casing member. The blind may now be swungto an open or closed position, and when either of these positions isreached one or the other of the notches 9 or will be brought over andinto line with the lug 21, when the lug Willenter the notch and theblind drop and look, as will be understood. When the blind has reachedeither of the positions just described and the lug 21 comes intoengagement with the notches 9 or 10, the blind will be locked in suchposition and cannot be swung until raised sufficiently to disengage thelug from the notch. The pintle 19 is of such length that they lug willbe far enough above the top of the blind member to permit the same to beraised sufficiently to allow notch therein to become disengaged from thelug 21 and permitting the blind to be swung, the lug 20 on the pintle 19serving to prevent the blind from being raised too high, thus avoidingdanger of the blind coming off.

In order to remove swung to such a position that will bring the notch 13in the blind member under or in line with the lug 20 on the pintle 19,when the blind may be raised and the hinge members disengaged.

While but one form of means for attaching the members of the hinge tothe blind or casing is shown, it will be understood that various otherforms than those herein shown may be employed for attaching the members,especially-constructed means being employed for different kinds ofstructure.

From the foregoing description, taken in connection with theaccompanying drawings,

the blind, the same isthe construction and operation of the inventionwill be readily understood without requiring a more extendedexplanation.

Various changes in the form, proportion, and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advantages of this invention.

Having thus fully described my invention,

what I claim, and desire to secure by Letters Patent, is

A self-locking hinge comprising a knuckle member 5 consisting of a shankor arm 6 formed at its outer end with a head 7 provided with an annularflange 8 having slots 9 and 10 at diametrically opposite points, thehead being formed withabore 12 provided with a vertical groove 13, anattaching-plate 14 formed on the inner end of the arm 6, and a spur 15projecting from said plate, in combination with a pintle membercomprising an arm or shank 17 provided at one end with a head 18, apintle 19 rising from said head and provided with a lug 20, a lug 21 onthe said arm 17 an attaching-plate 22 at the inner end of the arm 17 anda spur 23 projecting from said plate, substantially as described.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

NAPOLEON J. ST. HILAIRE. Witnesses:

MARSHALL N. THAYER, KATHARINE W. RIARK.

